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Everything is made of atoms which are indivisible and indestructible. Between atoms lies empty space and atoms are always moving. He also found that there are an infinite number of atoms which are different shaped are sized.
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Atoms were held together by attractions called forces. He adapted atomism to fit the concept of God’s role in creation.
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Development of modern atomic theory. Atoms of an element were the same as its weight and that the atoms of different elements had different weights.
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Discovery of the electron and invention of the plum pudding model which was later found to be untrue by E. Rutherford.
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Electricity was made of electrons, but this was just a theory at the time.
Experiment: found this through information and data from the electrolysis of water and the kinetic theory of gases. -
Established the quantum theory in which energy can only be absorbed or radiated in discrete values or quanta.
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Electrons spin around the nucleus, therefore electrostatic force is present.
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found out the charge of an electron Experiment: Oil-drop experiment/ falling drop method.
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Devised the Rutherford model, which is a model of the atom, discovery of protons and suggested the idea of neutrons in the nucleus.
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Arranged the Periodic Table in order of the atomic numbers of the elements.
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Made the Bohr model of the atom which showed that electrons moved in specific orbits and the shell model of the atom in which an element’s chemical properties are determined by the number of electrons in the outermost orbit.
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Discovered and proved that neutrons existed.
